Door jack



March 17, 1925.

DOOR JACK Filed March 14. 1924 III I .if'gzz J0 J,

Patented Mar. 17, 1925,

'UN'HTED STATES PATENT FHCE.

DOOR JACK.

Application filed March 14, 1924. Serial No. 6%,365.

To all whom 'it may concern:

lie it known that I, Fnnniuo G. CROSBY, a citizen of the United States, residing at Coggon, in the county of Linn and State of Iowa, have invented a new and useful Door Jack, of which the following is a speciiication.

By way 01": explanation, it may be stated that. the sliding doors of freight cars, frequently stick or become dislodged from the tracts on which the doors are mounted, the result being, in some instances, that the services of several men are required in order to shift the doors. in other instances, the doors are nricd open, forcibly, by bars or the like, to the damage of the door, the car body, or both.

The foregoing being understood, this invention aims to provide a simple jack, by which one man may conveniently raise the war door slightly, and start the door toward an open position.

it is within the province of the disclosure to improve generally and to enhance the utility of devices of that sort to which the i n vention appertains.

li ith the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention shown, can be made, without departing from the spirit of the invention.

in the accompanying drawings Figure 1 shows in side elevation, a freight car. the device forming the subject matter o'l' this application being in operative position with respect to the door of the car;

Figure 2 is a side elevation of the jack itself;

l igure 3 is an elevation wherein the jack is viewed at right angles to the showing of Figure 2;

Figure d is a fragmental section on the line el 1.ot Figure 2.

The jack forming the subject matter of this application comprises a base, which is denoted generally by the numeral 1, the base preferably being in the form of a block of wood or any other substance, the thickness of the base being considerably less than its height, and the height of the base being appreciably less than its length. There is a recess 2 in the lower edge of the base 1, the lower edge of the base slanting downwardly and outwardly, as at 3, from one end of the recess 2, to form a gripping toe 1 at one end of the base. Intermediate its ends, and at one end of the recess 2, the base has a vertical shoulder 5. A portion of the lower edge of the base 1 slants downwardly and inwardly as at 6, to form, with the shoulder 5, a gripping too 7 disposed intermediate the ends of the base. The base 1 is reintor'ced on its opposite sides by metal strips 8, countersunk into the opposite sides of the base 1, as shown in Figure 4 and ex tended downwardly on the gripping toes 4 and 7, the strips 8 of the respective pairs being connected by securing elements 9, pass ing through the base 1.

The numeral 10 designates generally, a

radius arm mounted for swinging move ment in a substantially vertical plane on the basev 1. The radius arm 10 is made up of bars 11 held apartby spacers 12, securing devices 1% passing through the bars 11 and through the spacers. Between the lower ends of the bars 11 or the radius arm 10, the base 1 is received, a pivot member 15 being mounted in the base 1 and the lower ends of the bar 11 of the radius arm 10 being mounted to swing on the pivot member 15. The numeral 16 denotes a lever received between the upper ends of the bars 11 of the radius arm 10 and held thereon for swinging movement, by means of apivot member 17, mounted in the bars 11 of the radius arm 10 and passing through the lever 16. The pivot member 17 is so located in the lever 16 as to divide the lever into a short part 18 and a long part 19. In the short part 18 of the lever 16, at the upper outer end of the said part, a rectangular seat 20 is fashioned, the end of the part 18 of the lever being reinforced by a binding strip 21, of metal, the binding strip conforming to the shape of the seat 20, and being secured to the part 18 of the lever 16, as indicated at 22. I

The numeral 23 designates a freight car, having a door 2 1 adapted to slide on tracks 25. The surface of the ground is shown at 26.

In practical operation, the jack is mounted as shown in the Figure 1, the toes 1 and 7 of the base 1 biting into the ground, and the lower corner of the door 27 being re ceived in the seat 20 of the lever 19. By swinging the outer end of the part 19 of the lever 16 downwardly, the door 24 will be raised, and, at the same time, the door will be caused to move to the left in Figure 1, the radius arm 10 swinging downwardly and to the left. The door, thus, may be started toward an open position, and if it is desired to carry the door along into a completely open position, the base 1 of the jack may be advanced along the ground 26, and the operation above described, may be repeated. The jack, of course, is quite as useful for closing the door as for opening it.

Having thus described the invention, what I claim is:

1. A jack for opening doors, comprising a base in the form of a block of rectangular cross section, provided in its lower edge with a recess which defines spaced, depending, earth-engaging toes having vertical edges, reinforcing strips disposed on opposite sides of the base andextended downwardly upon the toes along the vertical edges thereof, means for securing the strips to the base, a radius arm comprising bars between which the base is located, the strips being countersunk into the base to permit the bars of the radius arm to swing in close relation to the base, means for connecting the lower ends of the bars pivotally with the base, between the strips, and a door-engaging lever ful crumed intermediate its ends on the radius arm, the strips exercising a double funcand the means for connecting the bars of the arm to the base.

2. A jack for opening doors, comprising a base in the form of a block of rectangular cross section, provided in its lower edge with a recess which defines spaced, depending, earth-engaging toes, having transverse edges, reinforcing strips disposed on 0pposite sides of the base and extended clownwardly upon the toes along said transverse edges thereof, means for securing the strips to the base, a radius arm comprising bars between which the base is located, means for connecting the lower ends of the bars pivotally with the base, between the strips, and a door-engaging lever fulcrumed intermediate its ends on the radius arm, the strips exercising a double function, in that they reinforce the toes, and, also, reinforce the block to withstand the strain imposed thereon by the radius arm and the means for connecting the bars of thearm to the base.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

FREDRIC C. CROSBY. lVitnesses LYNN SAVAGE, IRVIN U. VVINEHART. 

